Question

行列式性质计算 2.3.10.0 1.2.0.1 0.3.5.18 5.10.15.4

Answer 1

1-2r2,r4-5r2

0 -1 10 -2

1 2 0 1

0 3 5 18

0 0 15 -1

r3+3r1

0 -1 10 -2

1 2 0 1

0 0 35 12

0 0 15 -1

r3+12r4

0 -1 10 -2

1 2 0 1

0 0 215 0

0 0 15 -1

r1r2,c3c4,r3r4

1 2 1 0

0 -1 -2 10

0 0 -1 15

0 0 0 215

= -215